Hello Vishal!

It is very tough to get a seat in Harcourt Butler as the competition is high for that. Still I'll suggest to have a look if spot round happens.

Rest there are some Central Government colleges which accept students with low scores. Those colleges are, 

GGU BILASPUR

GKV HARIDWAR

HNB GARHWAL

NEHU SHILLONG

You may get a good branch in these colleges. But make sure, before going to these colleges you must be ready for hardwork as you will get the results of what you personally do. 

All the best!